Dust-collector.



A. C. GOEIHEL. DUST COLLECTOR.

APPLICATION FILED M125. 1913.

1 ,206, 1 03. Patented Nov. 28, 1916.

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DUST COLLECTOR.

APPLICATION men 00125. ms.

1,206,103. Patel lied Nov. 28, 1916.

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ALFRED C. GOETHEL, OF MILWAUKEE, WISCONSIN.

DUST-COLLECTOR.

Specification of Letters Patent.

Patented Na. 28, 1916.

Application filed October 25, 1913. Serial No. 797,189.

To all whom it may concern:

Be it known that I, ALFRED O. GOETHEL,

a citizen of the United States, residing at- Milwaukee, county' of Milwaukee, and State of Wisconsin, have invented new and useful Improvements in Dust-Collectors, of Which the following is a specification.

My invention relates to improvements in dust collectors.

The object of my invention is to provide a form of construction in which the dust may be effectually separated from the air and in which undue air pressure may be avoided. Also to provide a form of construction in which the dust will be automatically removed from the separating member, which will ordinarily conslst of a strip or strips of fabric.

In the drawings Figure 1 is a side elevation of a dust collector embodying my invention, partially broken away to show the interior chamber partly in elevation and partly in vertical section. Fig. 2 is a horizontal sectional View taken on a plane cutting the dust collector between the upper set of bars D and the next succeeding set of such bars. Fig. 3 is a fragmentary view in vertical section on an enlarged scale.

Like parts are identified by the same reference characters throughout the several views.

An interior chamber A constitutes an initial dust collecting chamber. Air char ed with dust is delivered to this cham er (preferably at the top) through a pipe B, which conveys it from a shop, mill or foundry, or from the outlet of a vacuum cleaning plant, or from any form of dust collecting machine. The chamber A is formed of posts C connected by horizontal bars D to which the strips E of fabric are secured. The fabric E is loosely woven and is adapted to permit a comparatively free passage of air therethrough, but the weave is sufficiently close so that a considerable portion of the dust will lodge upon its interior surface. v

Exterior to the fabric bands E, I provide a band of wire netting F. The upper and lower margins of these bands E and F are connected with the respective bars D by metallic coupling members H, which comprise strips of soft metal, reversely. bent and adapted to embrace one margin of each of the bands E and F and one margin of the bar D, as clearly shown in Fig. 3. These coupling members H are preferably formed of brass or other material sufficiently pliable to allow the outer margin H to be bent outwardly to permit the removal of the bands when it is desired to repair or replace them. The woven wire band Fnot only 'reinforcesthe fabric band E, but it serves as a stationary whipper against which the inner band E flaps imder varying air currents or air pressure, thus dislodging the dust which tends to collect on the inner sur face of the band E.

It will be observed that the chamber A is slightly tapered from a point near the bottom to the top. This also facilitates the separation of the dust from the fabric band E, and when separated, the dust drops to the bottom of the chamber without lodging upon the lower bands.

The outer chamber A is formed by a wall composed of posts 0, bars d, fabric bands 6 and wire bands I, all of which are similar in construction to the correspondingly lettered elements composing the inner chamber A and designated by capital letters. The top of this outer chamber A is composed of a strip or strips of fabric 6' with strips of wire fabric or netting f and f above and below it. The top of the chamber A is similarly formedof strips of fabric E covered by wire netting, F and F. The Wall of the chamber A is preferably vertical, although this is not essential. The cavity between this wall and the inner wall, 2'. e. the wall of the chamber A, constitutes a settling chamber in which the air is substantially quiet, the air currents being effectually broken up by the fabric and wire netting bands E and F through which it passes from the chamber A into this space. The fabric bands 6 of the outer wall are more closely woven and may also be composed of smaller threads so as to catch and hold the smaller dust particles, but the area of this wall is much greater than that of the wall of chamber A. Also the quantity of dust in the air is much less and the pressure will ordinarily be less,'s ince owing to the large area of the outer wall space, the air need pass but slowly through any given portion of the fabric in order to almost wholly relieve the pressure in the cavity between the two walls. The outer wall isalso more subject to external influences, such as blasts of air, jars, etc. and where the apparatus is located exterior to a building, this wall is also frequently washed by rains, whereby it is kept comparatively free from lodgments of dust thereon. I

Where there is any danger of clogging 1n the outer wall either by sleet, freezing thereon, or by light rains, which moisten the dust and cause it to adhere instead of washing it away, it is desirable that the separating chamber be provided with a safety vent. For this purpose theroof I is provided with an opening, through which a tube or walled passage J extends from the chamber A. A cap K is supported above the tube J to keep out the elements and a valve L also covers the top of the passage J and normally closes the same, so that no dust laden air may pass therethrough. The valve L is hinged to the wall of'the passage at M and is preferably provided with a counterweight N, whereby it may be easily lifted in case an appreciable pressure develops in said chamber. 0 is a ring which is also supported from the cap K or from any suitable point. This ring is adapted to 006perate with the cap K in excluding snow and sleet. It will of course be understood that the inner chamber A may be provided with a similar safety vent, if desired, but this will ordinarily not be necessary for the reason that the coarse weave of the burlap covering will never become clogged sufficiently to allow a destructive pressure to develop within this chamber. Also for the reason that this chamber is open near the bottom as hereinafter explained.

The chamber A is also provided with a door P, through which access may be had to the interior. An outlet Q allows the dust to be swept from the bottom of this chamber, as desired. The inner chamber A. may be provided with a similar outlet and also with adoor affording access thereto, but this is not deemed necessary for the inner chamber, since the fabric in the wall of this chamber is so loosely woven that the dust can be easily dislodged by shaking the fabric or whipping it after entering the chamber A. The fabric employed is preferably burlap, but I do not limit the scope of my invention to this material, since any fabric, metallic or non-metallic, which is adapted to separate dust from air passing through it, may be employed for this purpose. The bottom of both chambers may be constructed in the form of a metal pan R having raised side walls S, and the space between the lower bar D and the bottom may be left wholly or partially uncovered, whereby the dust accumulating in the pan B may be scraped to the outlet Q. This open space prevents pressure from developing in the inner chamber and not only does away with the necessity of a safety valve as above eX- plained, but it also so completely prevents the development of pressure, that the particles of dust will not be forced through the walls F. On the other hand, suflicient air will pass through the walls F to prevent the formation of currents through the opening below the lower bar D, which might otherwise carry considerable quantities of dust into the outer separating chamber. Any dust blowing through such opening will be received and taken care of in the outer chamber or space between the two walls. The bars D are each preferably provided with an inwardly projecting flange D, which is recessed at intervals to receive the posts C.

I claimy 1. The combination with a dust pipe, of an initial dust collecting chamber having 11 wardly tapering walls and connected at 1ts upper end with said pipe, an outer dust collecting chamber inclosing the inner dust collecting chamber, and having a closed bottom, said inner dust collecting chamber being wholly open and unobstructed at its lower end, and having walls terminating at a sufficient distance above the bottom of said chamber to provide an open and unobstructed space for the escape of air from the initial chamber to the space between said initial chamber and the outer wall without constriction, whereby the air may pass from the initial to the outer chamber without developing sufficient current to carry dust with it from the bottom of said outer chamber, substantially as described.

2. The combinationwith a'dust pipe, of an initial dust collecting chamber, having upwardly tapering walls and connected at its upper end with said pipe, said chamber being open and unobstructed near its bottom portion, said walls comprising a'supporting frame, a dust collecting fabric inclosing the tapering portions of said frame, a reinforcing wire netting covering the outer surface of said fabric and connected with.

the frame and against which'the fabric may vibrate to shake ofi the dust, and a dust col lecting pan forming the bottom of said chamber below the lower margin of the fabric walls, the space between said pan and fabric walls being open and unobstructed.

8. A dust collecting chamber, comprising a set of posts, a set of horizontal frame bars connecting said posts, coupling strips, each having one margin folded in gripping relation to one of said frame bars, other coupling strips, each having one margin folded in gripping relation to said posts, and strips of fabric spanning the spaces between said posts and frame bars, said {coupling members having their opposing margins folded in coupling relation to the margins of said fabric strips, substantially as described.

LA dust collector, comprising an initial separating chamber, having walls permeable to air, extending from the top of'said chamher to points near the bottom thereof, said walls terminating above the bottom of said chamber with open and unobstructed spaces between their lower margins and the chamber bottom, means for delivering dust laden air into the top of said chamber, and an outer chamber, provided with walls also permeable to air, and spaced from the walls of the inner chamber, said outer chamber being provided with a vent and a safety valve 10 controlling the passage of air through said vent.

In testimony whereof I aflix my signature in the presence of two witnesses.

ALFRED G. GOETHEL. Witnesses:

LEVERETT 0. WHEELER, IRMA D. BREMER. 1

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. 0. 

